Research on Interface Critical Fracture of Different Materials Based on Critical Fracture Curve

Abstract:

In order to get the interface fracture curve of different materials under the four-point loading test pieces, firstly the displacement of fracture interface was obtained based on the finite element method. Then the first and second stress intensity factors of two different materials interface cracks in a beam specimen were calculated by the extrapolation method. Comprehensively considered the type of fracture specimen and the relative proportions between first and second section stress intensity, the variables K' , the first and second stress intensity factor were calculated according to the observed values of fracture load when the fissure appeared. By regression analysis of a six-groups of rock-concrete specimens with prefabricated fissure, the interface fracture criterion of different materials was got which was the interface fracture curve of rock-concrete samples. At last the calculated results of this method were compared and verified with the other related research results.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 3090-3093
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.3090
• Online since: October 2012
• Authors: Heng Xiang Zheng*, Cai Ying Chen
• Keywords: Different Material, Finite Element Method (FEM), Interface Fracture Curves, Stress Intensity

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